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JEE Main202131 Aug 2021Morning ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Consider the sulphides HgS , PbS , CuS , Sb 2 S 3 , As 2 S 3 and CdS . Number of these sulphides soluble in 50 % HNO 3 is ___________ .

Correct answer

0

Step-by-step solution

CdS ,   PbS ,   As 2 S 3 and CuS , are soluble in 50 %   HNO 3 while HgS and Sb 2 S 3 are insoluble in 50 %   HNO 3 but HgS soluble in aqua regia.

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